Rob Schmitz, China correspondent for Marketplace, has been living in China on and off since 1995. He is the author of Street of Eternal Happiness: Big City Dreams Along a Shanghai Road, a book about the people living and working on Changle Lu in Shanghai. Many of the characters who Rob writes about are waidiren—people who moved to Shanghai from elsewhere and have tried to make a living by catering to the tastes of well-off residents of the city. One of them, CK, is an accordion salesman turned sandwich restaurant proprietor.